feat(fonts): add fonts storage

go.mod

@@ -4,11 +4,13 @@ go 1.24.9
 
 require (
 	github.com/dustin/go-humanize v1.0.1 // indirect
-	github.com/glebarez/go-sqlite v1.22.0 // indirect
+	github.com/glebarez/go-sqlite v1.22.0
 	github.com/google/uuid v1.5.0 // indirect
 	github.com/mattn/go-isatty v0.0.20 // indirect
 	github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec // indirect
+	golang.org/x/image v0.36.0
 	golang.org/x/sys v0.15.0 // indirect
+	golang.org/x/text v0.34.0 // indirect
 	modernc.org/libc v1.37.6 // indirect
 	modernc.org/mathutil v1.6.0 // indirect
 	modernc.org/memory v1.7.2 // indirect

go.sum

@@ -8,9 +8,13 @@ github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWE
 github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94icq4NjY3clb7Lk8O1qJ8BdBEF8z0ibU0rE=
 github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
+golang.org/x/image v0.36.0 h1:Iknbfm1afbgtwPTmHnS2gTM/6PPZfH+z2EFuOkSbqwc=
+golang.org/x/image v0.36.0/go.mod h1:YsWD2TyyGKiIX1kZlu9QfKIsQ4nAAK9bdgdrIsE7xy4=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.15.0 h1:h48lPFYpsTvQJZF4EKyI4aLHaev3CxivZmv7yZig9pc=
 golang.org/x/sys v0.15.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/text v0.34.0 h1:oL/Qq0Kdaqxa1KbNeMKwQq0reLCCaFtqu2eNuSeNHbk=
+golang.org/x/text v0.34.0/go.mod h1:homfLqTYRFyVYemLBFl5GgL/DWEiH5wcsQ5gSh1yziA=
 modernc.org/libc v1.37.6 h1:orZH3c5wmhIQFTXF+Nt+eeauyd+ZIt2BX6ARe+kD+aw=
 modernc.org/libc v1.37.6/go.mod h1:YAXkAZ8ktnkCKaN9sw/UDeUVkGYJ/YquGO4FTi5nmHE=
 modernc.org/mathutil v1.6.0 h1:fRe9+AmYlaej+64JsEEhoWuAYBkOtQiMEU7n/XgfYi4=

internal/command/commandline.go

@@ -30,7 +30,7 @@ func HandleCommandline() {
 	} else if help {
 		flag.PrintDefaults()
 	} else {
-		svg.Storage = svg.NewFileStorage(datapath)
+		svg.Storage = svg.NewFileStorage(datapath, "fonts")
 		server.PrepareHTTP()
 		server.Start()
 	}

internal/routes/font.go

@@ -0,0 +1,12 @@
+package routes
+
+import "net/http"
+
+func AddFont(w http.ResponseWriter, r *http.Request) {
+
+	if r.Header.Get("Content-Type") != "font/ttf" {
+		http.Error(w, "", http.StatusUnsupportedMediaType)
+		return
+	}
+
+}

pkg/svg/storage.go

@@ -1,28 +1,40 @@
 package svg
 
 import (
+	"errors"
 	"io"
 	"log"
 	"os"
 	"path/filepath"
+	"strings"
+
+	"golang.org/x/image/font/sfnt"
 )
 
 type SvgStorage interface {
 	Create(id string, svg io.Reader) (string, error)
 	Get(id string) (io.Reader, error)
+	AddFont(reader io.Reader, format string) error
+	GetFonts() ([]string, error)
+	GetFontsDir() (string, error)
 }
 
 type FileSvgStorage struct {
 	basepath     string
+	fontssubpath string
 }
 
-func NewFileStorage(path string) *FileSvgStorage {
+func NewFileStorage(path string, fontssubpath string) *FileSvgStorage {
 	err := os.MkdirAll(path, 0755)
 	if err != nil {
 		panic(err)
 	}
+	err = os.MkdirAll(filepath.Join(path, fontssubpath), 0755)
+	if err != nil {
+		panic(err)
+	}
 	log.Println("Initialized file storage handler")
-	return &FileSvgStorage{path}
+	return &FileSvgStorage{path, fontssubpath}
 }
 
 func (f FileSvgStorage) Create(id string, svg io.Reader) (string, error) {
@@ -49,3 +61,62 @@ func (f FileSvgStorage) Get(id string) (io.Reader, error) {
 	}
 	return file, nil
 }
+
+func (f FileSvgStorage) AddFont(fontreader io.Reader, format string) error {
+	fontblob, err := io.ReadAll(fontreader)
+	if err != nil {
+		return err
+	}
+	if format != "ttf" && format != "otf" {
+		return errors.New("Format not supported")
+	}
+	file, err := os.CreateTemp(filepath.Join(f.basepath, f.fontssubpath), "*."+format)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+	file.Write(fontblob)
+	return nil
+}
+
+func (f FileSvgStorage) GetFonts() ([]string, error) {
+	path := filepath.Join(f.basepath, f.fontssubpath)
+	entries, err := os.ReadDir(path)
+	if err != nil {
+		return nil, err
+	}
+	fonts := make([]string, len(entries))
+	for i, entry := range entries {
+		if entry.IsDir() {
+			continue
+		}
+		if strings.HasSuffix(entry.Name(), ".ttf") || strings.HasSuffix(entry.Name(), ".otf") {
+			fontblob, err := os.ReadFile(filepath.Join(path, entry.Name()))
+			if err != nil {
+				return nil, err
+			}
+			fontname, err := getFontName(fontblob)
+			if err != nil {
+				return nil, err
+			}
+			fonts[i] = fontname
+		}
+	}
+	return fonts, nil
+}
+
+func (f FileSvgStorage) GetFontsDir() (string, error) {
+	return filepath.Join(f.basepath, f.fontssubpath), nil
+}
+
+func getFontName(svgblob []byte) (string, error) {
+	font, err := sfnt.Parse(svgblob)
+	if err != nil {
+		return "", err
+	}
+	name, err := font.Name(nil, sfnt.NameIDFull)
+	if err != nil {
+		return "", err
+	}
+	return name, nil
+}